41results about How to "Won't pour back" patented technology

The invention belongs to the technical field of ship accessories, and relates to a vertical-axis tidal current energy hydraulic turbine set with a seaworthiness adjusting device. The vertical-axis tidal current energy hydraulic turbine set comprises a rack, a first generator, a first coupler, a machine shell, a first connecting rod, first blades, connecting columns, second rollers, second blades, second couplers, second generators, a first support, a second support, a third generator, a third coupler, third blades, a third roller, a piston type one-way valve, a third support, a water outlet pipe, a second connecting rod, supporting frames, water inlet pipes, water suction pumps, water outlet pipes, a first roller and flange bearings. The flange bearings are arranged at the upper end and the lower end in the machine shell. The first roller is installed on the two flange bearings, and the upper end of the first roller extends out of the machine shell. The vertical-axis tidal current energy hydraulic turbine set has the beneficial effects that water flowing down from the blades can be used, and water flowing out of a flowing-out pipe of a hydraulic turbine can be secondarily utilized.

The invention discloses an electromagnetic check valve of a common flue. The electromagnetic check valve comprises a base, a barrel body, a valve element, a one-way valve block and a reducing ring, wherein the valve element and the one-way valve block are arranged in the barrel body. The electromagnetic check valve is characterized in that an electromagnetic device is arranged on the valve element, and an iron sheet is arranged at the position, corresponding to the electromagnetic device, of the one-way valve block; the electromagnetic device comprises an electromagnet, and a common magnet is fixed at the top of the electromagnet. When a smoke exhaust starts to work, the electromagnetic device is in the power-on state, magnetic fields of the electromagnet and the common magnet are offset, magnetic force of the electromagnetic device is lost, and the one-way valve block can be freely opened. Air flow with cooking fumes passes through an air inlet and a cooking fume channel to push the one-way valve block open, and the cooking fumes are discharged into the common flue. When the smoke exhaust stops working, the electromagnetic device is in the power-off state, the magnetic force of the electromagnetic device is recovered, the electromagnetic device and the iron sheet on the one-way valve block are attracted, the one-way valve block falls to the position of a circular stopping ring of the barrel body under the effects of suction force of the magnet and the gravity of the one-way valve block, the cooking fume channel smoke channel and the common flue are separated to form complete sealing.

The invention discloses a check valve with double fireproof valves for a smoke flue, which comprises a valve body, a sealing valve and a spring and is characterized in that the valve body is divided into a main valve body and an auxiliary valve body; and the auxiliary valve body is placed in the main valve body and is assembled with the main valve body in a matching manner. The check valve has the advantages that the fireproof valves of the check valve have the function of leading smoke upwards, no smoke backflow can be generated, and the smoke-blocking and fireproof effects are good; and moreover, the big flue is not required, so that the building weight can be reduced, the kitchen space is enlarged, and the construction cost is reduced.

The invention relates to the technical field of oil and gas well cementing devices, and provides an automatic grouting device for a well cementing sleeve. The automatic grouting device for the well cementing sleeve includes a tubular device main body, a single-flow valve assembly is arranged in the device main body, the single-flow valve assembly includes a spring seat, and the spring seat is provided with a spring for abutting against a valve ball to a valve port of the single-flow valve assembly, the valve port is formed by a one-way movable valve seat disposed in the device main body, the one-way movable valve seat includes two or more valve blocks swinging up and down, and the valve blocks have a closed state in which the valve port is formed by mutual closing and an open state for thevalve ball to pass from top to bottom, the top of the spring is provided with a valve ball seat for supporting the valve ball, and the valve ball seat is provided with a ball seat circulating hole communicated with the valve port. The device does not need intermittent operation and has a stable working state during grouting and can reduce the amount of work, improve the work efficiency of the well cementing operation, reduce parts needed during the grouting process and reduce the production cost.

The invention relates to a one-stage deoxidizing device for indirect heat-exchange forcible mixed exhaust steam recovery of condensate water and desalted water. A first water inlet pipe, a second water inlet pipe, a third water inlet pipe and a fourth water inlet pipe are connected onto a pressure-bearing buffer tank, wherein the first water inlet pipe and the third water inlet pipe are located on the upper layer, and the second water inlet pipe and the fourth water inlet pipe are located on the lower layer; mixed condensate water is introduced into the second water inlet pipe and the fourth water inlet pipe respectively after subjected to heat exchange with synthesis ammonia desalted water and conversion desalted water through a third heat exchanger and a fourth heat exchanger, the synthesis ammonia desalted water and the conversion desalted water are introduced into the first water inlet pipe and the third water inlet pipe respectively after subjected to heat exchange through the third heat exchanger and the fourth heat exchanger; buffer tank exhaust steam is cooled into buffer tank exhaust steam condensate water by a first heat exchanger, the buffer tank exhaust steam condensate water is injected into the pressure-bearing buffer tank by a condensate water collecting tank and a second water pump, and non-condensable gas is discharged simultaneously; a water outlet pipe of the buffer tank is connected with an inlet of a first water pump, and an outlet of the first water pump is connected to a boiler water replenishing pipe; and a forcible mixing impeller is mounted at the middle-lower part of the inner cavity of the pressure-bearing buffer tank, and a blow-down pipe is connected to a bottom plate of the pressure-bearing buffer tank. According to the device, the utilization rate of condensate water waste heat is high, and the operation is reliable.

The invention discloses an integrated automatic flow regulating and intercepting well equipment, which includes an equipment box, the equipment box is made of glass fiber reinforced plastic, and the inside of the equipment box is divided into four parts by cross-shaped glass fiber reinforced plastic partitions, and the four parts are divided into four parts according to Confluent sewage wells, overflow sewage wells, anti-sewage backflow wells and valve wells are arranged clockwise. The integrated automatic flow regulating and intercepting well equipment of the present invention adopts structural equipment, and introduces a swirl flow limiting valve and a duckbill valve at the same time, avoiding the long construction period of traditional intercepting wells, the difficulty of accurately controlling the amount of intercepted sewage, and the inability to prevent backflow Defects. The invention also discloses a flow closure process of the integrated automatic flow regulation and closure well equipment.

The invention relates to a deoxidized exhaust steam condensing device for mixed recovery of condensate water and desalted water. A first water inlet pipe, a second water inlet pipe, a third water inlet pipe and a fourth water inlet pipe are connected onto the circumference of a pressure-bearing buffer tank, wherein the first water inlet pipe and the third water inlet pipe are located on the upper layer, and the second water inlet pipe and the fourth water inlet pipe are located on the lower layer; synthesis ammonia cooled desalted water and conversion cooled desalted water are introduced into the first water inlet pipe and the third water inlet pipe respectively, and calcining furnace condensate water and fluidized bed condensate water are introduced into the second water inlet pipe and the fourth water inlet pipe respectively; the top of the pressure-bearing buffer tank is connected with a buffer tank steam discharge pipe; a buffer tank water outlet pipe is connected with a first water pump, an outlet of the first water pump is connected to a deaerator head water inlet pipe of a high-pressure deaerator, a deaerator tank drain pipe is connected to a boiler water replenishing pipe through a third water pump, the deoxidized exhaust steam becomes deoxidized exhaust steam condensate water after condensed by a second heat exchanger, and the deoxidized exhaust steam condensate water enters a condensate water collecting tank and is sent to the pressure-bearing buffer tank by a second water pump; and drain outlets are formed in a bottom plate of the pressure-bearing buffer tank and connected with a blow-down pipe, and a second control valve is mounted on the blow-down pipe. According to the device, the utilization rate of condensate water waste heat is high, and the operation is reliable.

The invention discloses a synchronous rectification device and method for an isolated power supply, and the device comprises a power semiconductor switch and a synchronous rectification controller, and a reference grounding end of the isolated power supply is connected with a reference ground through the source and drain electrodes of the power semiconductor switch. In the synchronous rectification controller, a control unit receives the voltage-crossing signals at the two ends of the source electrode and the drain electrode of the power semiconductor switch, separately controls a switching-onunit and a switching-off unit to switch on and off the power semiconductor switch according to the voltage-crossing signals, and controls a hysteresis unit to be switched on discontinuously and circularly so as to gradually pull down the grid voltage of the power semiconductor switch in a stepped mode. According to the present invention, the technical problems of low conversion efficiency, current backflow and short circuit of the isolated power supply are solved, the power semiconductor switch can be quickly turned on and turned off, the gate voltage of the power semiconductor switch is gradually reduced in a stepped manner, and the switch is directly turned off when the gate voltage approaches to a cut-off threshold voltage, so that the current backflow is reduced, and the opportunity of primary/secondary side short circuit is reduced.

The invention aims to provide a power distribution cabinet with rainwater draining and blocking functions. Thepower distribution cabinet can drain and block the rainwater entering from a heat dissipation exhaust pipe, thereby ensuring the safe operation of internal electrical devices. The power distribution cabinet comprises a mounting base, and a cabinet body is fixedly connected to the top of the mounting base. Thepower distribution cabinet is characterized in that a heat dissipation device is fixedly mounted at the right side of the cabinet body, the heat dissipation device comprises the heat dissipation exhaust pipe, and a sliding rail is fixedly installed at the right side of the heat dissipation exhaust pipe; a fixing block is fixedly connected to the bottom end of the interior of the sliding rail, a sealing belt is fixedly connected to the top of the fixing block, and a floating block is fixedly connected to the top of the sealing belt; a pressing block is fixedly connected to the top of the floating block, the floating block slides in the sliding rail, and a waterproof button is fixedly installed at the top end of the interior of the sliding rail; a switch valve is fixedlyinstalled at the top of the waterproof button, is electrically connected with the waterproof button through a wire, and is electrically connected with a main power supply of the cabinet body through awire.

The invention relates to a condensate water and demineralized water indirect heat-exchange exhaust steam recovery two-stage deoxygenization device. According to the invention, a pressure-bearing buffering tank is provided with a first water inlet pipe and a third water inlet pipe positioned on an upper level, and a second water inlet pipe and a fourth water inlet pipe positioned on a lower level. Mixed condensate water is respectively subjected to indirect heat-exchange with synthetic ammonia demineralized water and transformation demineralized water through a third heat exchanger and a fourth heat exchanger, and is then respectively connected into the second water inlet pipe and the fourth water inlet pipe. After the heat-exchange process through the third and fourth heat exchangers, the synthetic demineralized water and the transformation demineralized water are respectively connected into the first water inlet pipe and the third water inlet pipe. Buffering tank exhaust steam enters a first heat exchanger and is cooled into buffering tank exhaust steam condensate water, and the buffering tank exhaust steam condensate water is replenished into the pressure-bearing buffering tank through a condensate water collection tank and a second water pump. Non-condensible gas is discharged at the same time. Buffering tank discharged water is delivered into a high-pressure deoxygenization device through a first water pump. A deoxygenization tank water discharge pipe is connected into a boiler water replenishing pipe through a third pump. A sewage discharge pipe is connected to a bottom plate of the pressure-bearing buffering tank. The device provided by the invention has the advantages of high condensate water residual heat utilization rate and reliable operation.

The invention relates to a secondary deoxidizing device for performing indirect heat exchange and forced mixing on condensed water and desalted water. A pressure-bearing buffer tank is connected with first and third water inlet pipes positioned on an upper layer as well as second and fourth water inlet pipes positioned on a lower layer; mixed condensed water is introduced into the second and fourth water inlet pipes respectively after undergoing indirect heat exchange with synthetic ammonia desalted water and transformed desalted water through third and fourth heat exchangers respectively; the synthetic ammonia desalted water and transformed desalted water are introduced into the first and third water inlet pipes respectively after undergoing heat exchange through the third and fourth heat exchangers; the middle part of the top wall of the pressure-bearing buffer tank is connected with a buffer tank exhaust pipe; buffer tank output water is pumped into a high-pressure deoxidizer through a first water pump; deoxidizing box drainage water is pumped into a water replenishing pipe of a boiler through a third water pump; the top of a deoxidizing head of the high-pressure deoxidizer is connected with a deoxidizing head exhaust pipe for exhausting deoxidizing exhaust steam and non-condensable gas; a forced mixing impeller is arranged on the middle lower part of the inner cavity of the pressure-bearing buffer tank; and a bottom plate of the pressure-bearing buffer tank is connected with a blow-off pipe. The device is high in residual heat utilization ratio of condensed water, and runs reliably.

The invention discloses a pure mechanical pneumatic control logic actuator of a vacuum toilet stool, comprising a first pneumatic stop valve which is connected with the toilet stool and a sewage tank; the second pneumatic stop valve is connected with the sewage tank and the sewage discharge pipeline; the pneumatic valve assembly comprises a vacuum tank, a first pressure tank and a second pressure tank; the first pressure tank controls the first pneumatic stop valve and the second pneumatic stop valve through the pneumatic valve assembly, and the suction rate and the discharge rate of the sewage tank are adjusted. According to the device, the opening or closing speed of the first pneumatic stop valve and the second pneumatic stop valve can be increased, noise of the toilet in the suction and pollution discharge process can be reduced, the effect that airflow washes the inner wall of a flow channel can be achieved, the risk of dirt adhesion and clamping is prevented, the pollution discharge efficiency is improved, and the service life of the toilet is prolonged. Meanwhile, sewage and air in the sewage tank cannot flow backwards through the first pneumatic stop valve.