172results about How to "Avoid backflow phenomenon" patented technology

The invention provides a cyclone separation device for preventing dust backflow. The cyclone separation device comprises a barrel dust collection box with a handle, an oval cyclone separator and a tapered filter, wherein, one face, which is opposite to the handle, of the dust collection box is equipped with a step; a dust collection box cover is arranged below the step; the cyclone separator is connected on the step, one side of the cyclone separator is connected with an air inlet which is vertically bent downwards, and the other side of the cyclone separator is equipped with a horizontal square dust outlet provided with an inner side wall and an outer side wall; the dust outlet is connected with the upper part of the dust collection box; the outer side wall of the dust outlet is formed along the tangent line of the peripheral surface of a position with the maximum diameter on the cyclone separator; and the inner side wall is formed by the mode that a parallel line for translating inwards along the tangent line of the peripheral surface of the cyclone separator to the lower end of the dust outlet inclines outwards 15-20 degrees. The cyclone separation device has the advantages of simple structure, high separation efficiency, reduced leakage of dust in a dust collector, guaranteed suction power and capability of preventing dust backflow, and is convenient in use. The cyclone separation device can be conveniently arranged in the dust collector, and a motor and a reel can be arranged below the cyclone separator, thus saving space.

The invention relates to the technical field of medical instruments, in particular to a post-circumcision cleaning and disinfecting mechanism. The cleaning and disinfecting mechanism comprises a flexible casing tube, a cleaning tube and a liquid collecting cylinder; one end of the cleaning tube is open, the other end of the cleaning tube is closed, and the open end of the cleaning tube is detachably connected with the casing tube; a fixed sealing part is disposed in the other end of the casing tube, a cleaning ring is disposed in the cleaning tube and is of an inner hollow structure, and flushing holes are formed in the inner side of a ring body in the circumferential direction; the cleaning ring is also connected with a liquid conveying tube, the liquid collecting cylinder is connected with the cleaning tube through a connecting tube, and a backflow prevention structure is installed in the middle of the inside of the liquid collecting cylinder. The cleaning and disinfecting mechanism has the advantages that uniform and thorough disinfection is realized, and waste liquid cannot flow back and be spilled out.

The invention relates to electronic equipment which comprises a shell, a circuit board placed inside the shell, a heating electronic element on the circuit board, and a heat radiation device arranged at one end of the shell, wherein the heat radiation device comprises a fan module and a fixing rack for fixing the fan module on the shell; the shell comprises a first sidewall and a second sidewall which are oppositely arranged, and a flow channel is formed between the first sidewall and the second sidewall; the heating electronic element is located in the flow channel; the fan module comprises a first fan and a second fan which are arranged side by side; the fixing rack is used for fixing the fan module at one ends of the first sidewall and the second sidewall; and a first through hole and a second through hole which are respectively corresponding to the first fan and the second are formed on the fixing rack, and the gas flows of the first fan and the second fan can pass through the first through hole and the second through hole so as to enter the flow channel. The electronic equipment also comprises a windshield which is rotatably connected to the fixing rack, wherein the windshield rotates around the fixing rack and shields the through hole corresponding to the fan in a non-operation state so as to avoid backflow at the position when any one of the first fan and the second fan is in a non-operation state.

A dishwasher is disclosed. The dishwasher includes a washing tub (4) defining a space in which dishes are washed by wash water, a sump (40) for collecting wash water introduced from the washing tub, a filter unit (100) disposed at the sump for filtering foreign matter from wash water flowing from the washing tub to the sump, and a cap (50) for preventing wash water from flowing backward from the filter unit (100) to the washing tub (4).

The invention provides a packing material combination plate element unsaturated evaporative radiator, which comprises a shell case, a fan, heat exchange elements, a spraying system and the like, wherein the lateral face of the case is provided with an air inlet and the top is provided with an air outlet, the air inlet of the case is provided with the heat exchange element, the spraying device is arranged above the heat exchange elements, the air outlet is provide with a draught fan, and a water baffle is arranged between the draught fan and the heat exchange elements. The heat exchange elements are formed by overlapping at least two groups of combination plate elements up and down, a polycarbonate asia ethyl ester packing material is filled between heat exchange plate pipes, the heat exchange plate pipes of two groups of up and down adjacent heat exchange elements are arranged in a staggering mode, the upper end of each heat exchange plate pipe is passed into a medium inlet pipe and is connected with a medium inlet header pipe, and the lower end of each heat exchange plate pipe is passed into a medium outlet pipe and is connected with a medium outlet header pipe; and water films are formed on the surfaces of the heat exchange elements under the action of the gravity of spray water, and the heat transfer is strengthened through water film evaporation. The packing material combination plate element unsaturated evaporative radiator achieves the crossed cross-flow type heat exchange between the water films and the air, and has high heat transfer efficiency, small wind resistance and perfect energy-saving and water-saving effect.

The invention discloses a rotary liquid-quenching batch electrostatic spinning device with a plurality of needlepoint group arrays, and the electrostatic spinning device is provided with a roller group and collection cloth that are used for batch collection for nanofibers. The electrostatic spinning device is provided with needlepoint groups, a sleeve, an electrode plate, a support, a rotary shaft, a coupler A, a DC (Direct Current) motor, a flume, a backflow plate, a solution guide pipe, a solution supply pump, a conveying roller, the collection cloth, a guide frame, an arc-shaped plate, a pressure roller, a collection roller, a coupler B, a roller motor, a high-voltage power supply, an infrared sensor and a main control board. Electrostatic spinning is carried out by introducing needlepoints, so that the solution backflow phenomenon and nozzle plugging are overcome, so as to reduce the critical starting voltage for spinning and improve the stability of jet flow of a spinning awl; the electrostatic spinning is carried out by using needlepoint group arrays, and the roller group and the collection cloth are combined as a collection device, thereby realizing batch manufacturing for the nanofibers and uniform non-woven fabric collection; solution is supplied in a way that the needlepoint groups rotate for quenching solution in the flume, so that the uniformity of solution supply can be realized, and the uniformity of diameters of the collected nanofibers is improved.

The invention relates to a medical portable intelligent infusion or blood transfusion dripping speed controller, which is characterized in that a slot capable of being arranged in an elastic compression pipe of a pump infusion apparatus is arranged on one side of a frame; a synchronous belt pulley is arranged on a motor and connected with an eccentric synchronous belt pulley which is arranged on the frame through a synchronous belt for transmission; one side of the eccentric synchronous belt pulley is provided with an eccentric wheel I which is positioned inside a through opening of a pressure slider; and the pressure slider is arranged inside a guide chute on the frame, and one end of the pressure slider is extended with a convex mandril which is closely connected with the outer pipe wall of the elastic compression pipe of the pump infusion apparatus. The device has small volume, light weight, safe and convenient carrying and use and long working hours, can be used for 10 hours by charging once, can also realize suspension-free and random arrangement of an infusion bottle, sets the dripping speed as required, and achieves the aims of precise infusion and safe monitoring of infusion.

The invention relates to the technical field of water inlet pump chambers of sewage pretreatment systems, in particular to a construction method of a water inlet pump chamber, which are characterized in that a main body of the water inlet pump chamber is an underground structure with a cylinder type cavity structure. The cylinder type structure is composed of a cylinder wall and a cylinder bottom, the surface side of the cylinder wall is encircled by twenty-seven underground continuous walls, five layers of inner linings are arranged on the inner side of the cylinder wall and the wall faces of the underground continuous walls in the vertical direction, and a ring of lock opening top beam is arranged at the top end of the cylinder wall. A plurality of water inlet pipelines are arranged on the right side of a fourth layer of the cylinder type cavity structure, the cavity structure in a cylinder is divided into a water inlet well area, a pump chamber area and a water outlet well area from front to rear, and a pump chamber separation wall is arranged between two adjacent areas. By means of the water inlet pump chamber and the method, the water inlet pump chamber is added in sewage treatment so as to serve as an auxiliary power to avoid backflow in the sewage treatment. The design of the four pump chambers and eight outlets can enable flow rate of sewage before flowing into follow-up steps to reach sufficient accordance.

The invention relates to a high-head small-flow forward multi-wing centrifugal blower, which is formed by integrally casting and has a low-noise characteristic. The forward multi-wing centrifugal blower comprises a scroll casing, an impeller and a current collector, wherein the impeller is arranged in the scroll casing; and the current collector is arranged at the air inlet of the scroll casing. The forward multi-wing centrifugal blower is characterized in that: the impeller and the scroll casing are cast integrally; the impeller is a forward multi-wing narrow-cavity impeller; and the scroll casing is an indent narrow-cavity scroll casing. The forward multi-wing centrifugal blower has the advantages of high aerodynamic performance, low noise, light weight and high structural strength; and a gap between the impeller and the scroll casing is reduced by adopting a narrow-cavity indent structure, and vortex caused by backflow between the impeller and the scroll casing can be effectively reduced, so that the airflow vortex noise in a cavity is lowered. Compared with a large quantity of low-noise centrifugal ventilation fans with the same air performance, the low-noise forward multi-wing centrifugal blower has the advantages that: he total pressure efficiency is increased by 7 percent, the air noise is lowered by over 5 dB(A), and the vibration acceleration level elastic installation condition of a fan chassis can be less than or equal to 115 dB, which is far less than those of products of the same type.

The invention discloses an automatic infusion heat preservation nursing control system for operating room which comprises a shell. The sides of the internal cavity of the shell are provided with a temperature sensor and a level sensor respectively. A spiral heating coil is wound on the interlayer of the shell A pressure boosting pump communicating with the shell is arranged on the upper portion of the shell. One side of the shell is provided fixedly with an electrical box which contains a storage battery, a processor and a communication device. The other side of the shell is provided with control switches. The bottom of the internal cavity of the shell is provided with averaged distributed liquid outlets. The lower side of the liquid outlet is communicated with a connection tube and a buffer bucket. The internal of the liquid outlet is provided with a solenoid valve. The bottom of the buffer bucket is provided with a liquid discharging tube. The lower portion of the internal of the liquid discharging tube is provided with a check valve. The automatic system can check the infusion environment and regulate the infusion process based on the checking result. The infusion condition can also be controlled by a remote terminal through the communication device. The operation is convenient.

The invention discloses a stop valve for an air conditioner. The stop valve comprises a valve body with a joint hole and a valve core, wherein the valve core comprises a valve rod and a piston arranged on the end part of the valve rod, a valve cap is arranged on a main hole port of the valve body, and the valve cap forms a through hole with an inner thread; and the through hole and an external thread arranged outside the valve rod realize vertical rotating flexible connection, and a cone hole is formed in a position on the joint hole, which approaches to the inner end part of the valve body. The stop valve provided by the invention can realize the communicated use of a high pressure stop valve and a low voltage stop valve, the whole structure is compact, the operation is convenient, the manufacturing cost can be saved, the installation space is reduced, the installation and maintenance programs are simplified, a person can operate conveniently, meanwhile, the production and manufacturing cost and difficulty are reduced, the energy consumption is reduced to a certain extent, and an energy conservation and emission reduction effect is achieved.

The invention discloses a balance pump which is provided with a pump body, a drive motor, a transmission device, a first connection pipe, a second connection pipe, a first back pressure valve and a second back pressure valve, wherein the pump body is provided with a first end, a pump cavity, a ceramic piston and a second end; the first end and the second end are arranged at the two ends of the pump cavity and communicated with the pump cavity; the ceramic piston is in clearance assembly and is movably arranged in the pump cavity; the ceramic piston is connected with one end of the transmission device, and the other end of the transmission device is connected with a motor shaft of the motor; the first end is provided with a first joint and a second joint; the second end is provided with a third joint and a fourth joint; a one-way valve is arranged in each joint; one end of the first connection pipe is connected with the second joint, and the other end of the first connection pipe is connected with the first back pressure valve; and one end of the second connection pipe is connected with the fourth joint, and the other end of the second connection pipe is connected with the second back pressure valve. The balance pump can accurately control the flow balance, and also provides power to the liquid flow.

The invention discloses an automatic stratified sampling geological survey device which comprises a device body, a first servo motor and a rope lowering rack are arranged at the top end of the device body, a control panel is fixedly mounted at the top end of the rope lowering rack, and a rope lowering groove is formed in the top end of the first servo motor; a rope body is arranged in the rope lowering rack, the sampling water tank is driven by a first servo motor to sink, and in the process that the sampling water tank gradually sinks, after an elastic extrusion pad at one end of the sampling water tank is extruded by the water pressure of underground water, the sampling water tank is stressed to move rightwards; and a sampling push rod is pushed away from the interior of a push cavity groove by utilizing the push rod body, and an arc-shaped through groove is exposed out of the interior of a first sealing sleeve gasket, so that underground water with different depths is collected into a sample storage cavity through connecting pipelines by utilizing the arc-shaped through groove.

The invention discloses coalbed methane exploitation filtering treatment equipment. The equipment comprises a treatment box body, a lower end cover, a sealed cover body, an exhaust device and an innerfilter cylinder. The sealed cover body is fixed to a lower end surface of the treatment box body through bolts, the lower end cover is mounted at an air inlet of the sealed cover body, and fed air issealed through the lower end cover, the inner filter cylinder is mounted in the treatment box body in the vertical direction, the inner filter cylinder is fixed with the treatment box body through connecting brackets on two sides outside the inner filter cylinder, also the treatment box body is externally communicated with the exhaust device, the filtered coalbed methane is effectively absorbed and discharged, a primary dust collection assembly, an extraction assembly and a fine filtration assembly are arranged in the inner filter cylinder, wherein the primary dust collecting assembly is usedfor primarily filtering and collecting large-particle coal dust mixed in coalbed methane, the fine filtration assembly is sleeved with the extraction assembly, and the extraction assembly is used forextracting the coalbed methane subjected to dust removal from the fine filtration assembly in time, so that the filtering treatment of the fine filtration assembly on the coalbed methane is accelerated.

The invention discloses an ejector capable of automatically adjusting the nozzle outlet position. The ejector comprises a working fluid communicating pipe, a nozzle, a receiving chamber, a mixing chamber and a diffusing chamber which are sequentially connected along the axis; an ejection fluid communicating pipe is arranged under the receiving chamber and introduced into the receiving chamber; thefront end of the working fluid communicating pipe is provided with the nozzle, the working fluid communicating pipe transversely penetrates and stretch into the receiving chamber, and the working fluid communicating pipe is movably installed and can move front and back along the axis; and a connecting chamber is fixed to the portion, located on the outer side wall of the back side of the receiving chamber, of the working fluid communicating pipe, the connecting chamber is installed at the back end of the receiving chamber along the axis and wraps the back portion of the receiving chamber, andthe front end of the connecting chamber is in sliding contact with the outer side wall of the receiving chamber. According to the ejector capable of automatically adjusting the nozzle outlet position, the nozzle outlet position of the ejector can be automatically adjusted when the working fluid pressure of the ejector changes within a certain range, the performance of the ejector is improved, andthe problem that the ejecting performance is seriously reduced when the working fluid pressure changes a lot is avoided or reduced.

Provided is a rotary multi-jet batch spinning device, relating to a static spinning device.The rotary multi-jet batch spinning device is provided with a collection drum, a liquid separation table, metal thin films, a cap table, rollers, roll balls, a coupler, a server motor, a motor rack, a support, a liquid supply device, a guide pipe and a high voltage power supply. An upper-layer guide board array and a lower-layer guide board array are arranged on the cap table and the liquid separation table. The liquid separation table and the cap table form a spinning nozzle body. Edges of the liquid separation table and the cap table are provided with groove arrays. Each groove in each groove array is distributed between two guide boards in the upper-layer guide board array. Upper and lower grooves are connected to form a micropore structure. Insides of the liquid separation table and the cap table are sprayed with the metal thin films connected with the power source. The bottom of the liquid separation table and the top of the support are provided with annular tracks, between which the roll balls for supporting are arranged. The bottom of the liquid separation table is provided with the rollers. The shaft segment at the bottom of the liquid separation table is connected with the server motor through the coupler. The server motor is fixedly connected with the support. The collection drum is of a circular structure. The collection drum and a spinning nozzle are arranged coaxially and connected to the ground.

The embodiment of the invention relates to the technical field of waste battery treatment, in particular to a method and a device for utilizing surplus energy. The method for utilizing surplus energyis applied to a detection platform, the detection platform is respectively electrically connected with an energy storage device and a plurality of waste battery packs, the waste battery packs are serially connected to form a discharge battery module, each waste battery pack is electrically connected with the energy storage device, and the method comprises the following steps: judging whether the voltage of the obtained discharge battery module is larger than the voltage of the obtained energy storage device; if so, controlling the discharge battery module to start discharging; judging whetherthe real-time voltage of the collected discharge battery module is smaller than the voltage of the energy storage device during discharging; and if so, controlling the discharge battery module to stopdischarging. By adoption of the method and device for utilizing surplus energy, the residual energy of the waste battery pack can be efficiently and safely recovered.

The invention relates to an energy-saving type grate plate of a grate cooler, which belongs to a part of a cement kiln and furnace and comprises a chassis 1, the bottom of which is provided with a wind inlet 5. The invention is characterized in that two side edges opposite to the chassis 1 are connected with hems 6, inverse U-shaped trough plates 2 and positive U-shaped trays 4 are respectively arranged in the chassis 1, wherein, two downward side edges of each inverse U-shaped trough plate 2 are respectively arranged in adjacent positive U-shaped trays 4 in an interval straddle way , the hems 6 are inserted in adjacent positive U-shaped trays 4 in an interval way, wind outlets 7 are formed between adjacent inverse U-shaped trough plates 2 as well as between the inverse U-shaped trough plates 2 on both sides and the hems 6 on corresponding side edges, and a main body of a section of each wind outlet 7 forms an inverse trapezoid. A strip-shaped wind stopping convex bar 3 is arranged on a central position of each positive U-shaped tray 4, and the upper end surface of the wind stopping convex bar 3 is higher than the lower edge of the inserted side edge of each inverse U-shaped trough plate 2. The invention has the advantages of simple structure, good effects of burning loss prevention and return blow prevention and high permeability of cooling wind, and increases the cooling efficiency of the grate cooler with a big extent.

The invention discloses intermittent oxygen-supplying apparatus used for water treatment. The apparatus comprises an oxygen pump, a treatment tank, a gas conveying pipe and an oxygen supplying device;the oxygen pump is fixed on the top of the treatment tank, the output end of the oxygen pump is connected with the oxygen supplying device through the gas conveying pipe, and the oxygen supplying device includes a supporting frame, fixing rods, a shell body, a gas inlet pipe, a flow quantity controlling device, a backflow preventing device, a connection block, a gas outlet pipe, a base seat, a dispersing device and an oxygen supplying pipe; and two ends of the supporting frame are fixed to the inner wall of the treatment tank, the top of the shell body is fixed to the supporting frame throughthe fixing rods, the output end of the oxygen pump is connected with the gas inlet pipe through the gas conveying pipe, the gas inlet pipe is fixed to the top of the shell body, and the gas inlet pipe communicates with the flow quantity controlling device. The intermittent oxygen-supplying apparatus used for the water treatment disclosed by the invention can intermittently supply oxygen to sewagelocated in the treatment tank, reduce waste of the oxygen, make the oxygen distributed more uniform in the sewage, and accelerate efficiency of the water treatment.

The invention relates to the technical field of medical apparatuses, and provides a chest washing and drainage tube. The chest washing and drainage tube comprises a puncturing tube, the rear part of the puncturing tube is sleeved with a sleeve tube, two rows of sucking disc groups are fixedly connected to the sleeve tube in the length direction of the sleeve tube, each row of the sucking disc groups comprises at least two sucking discs, the rear end of the puncturing tube is communicated with a connecting hose, the rear end of the connecting hose is communicated with a first communicating valve and a third communicating valve, and the other two valve openings of the first communicating valve and the third communicating valve are respectively communicated with a washing tube and a drainage header tube; the washing tube is provided with a stop valve, and the washing tube is communicated with an injector connecting base in the position of the rear part of the stop valve; the rear end of the drainage header tube is communicated with a second communicating valve and a third communicating valve, the other two valve openings of the second communicating valve and the third communicating valve are respectively communicated with two drainage branch tubes, and a one-way valve is arranged on each drainage branch tube. The chest washing and drainage tube has the advantages of simple structure and easiness in operation. The pain of patients can be relieved, and the treatment and the nursing for the chest are convenient.